Intermittent grip with lever actuator



7 July 11, 1950 CIPRIANQ 2,515,032

INTERMITTENT GRIP WITH LEVER ACTUATOR Filed Jan. 11, 1946 2 Sheets-Sheet1 INVENTOR.

July 11, 1950 E. ClPRlANO 2,515,032

INTERMITTENT GRIP WITH LEVER ACTUATOR Filed Jan. 11, 1946 2 Sheets-Sheet 2 INVEN TOR.

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Patented July 11, 1950 UNITED STATES. PATENT OFFICE I, i A,2,5.15,032::I g U Q a INTERMITTENT can? l wrrri'tnviin Ao'rUA'ron Enrico Gipriano,Johnston, R. 1., assignor to Roll- Feeds Corporation, Pawtucket, R. 1.,a corporation o f R hode Island i Application January 11, 194.6,"SerialNo. 640,653

' 7, 1/1 Claim. (01. 74-142) My present inventionrelates to feedingvattachments, and. more particularly to a novel.

construction of friction feed for a power press or similar machine.

The principal object of the present invention is to provide a, frictionfeed which ishighly a ccurate and dependableto close tolerances.

Another object of the present invention is to provide a friction typefeed which is insured A further object of the present invention is toprovide a friction feed which is simple in con-. stnuction and easy andeconomical to manufacture and assemble.

With the above and other objects and ad'- vantageous features in view,my invention consists of 'a novel arrangement of parts,'more fullydisclosed in the detailed description following, in conjunction with theaccompanying drawings, and more fully, defined in the appended claim.

In the drawings- Fig. 1 is a perspective view of a. friction feedembodying my invention;

Fig. 2 isa perspective view ofthe feed with one of' the friction wheelsremoved to show the interior; Fig. 3 is a perspective view of one of thefriction wheels, showingthe outside; 7

Fig. 4 is a similar viewshowing the inside; Fig. 5-is a perspective viewof the brake; Fig. 6 is a perspective view of the gripping member; and 1Fig. 'l is a perspective view of the rocker arm. .To feed metal in stripform under the hammer of a power press or similar machine, the metalstrip is passed between a pair of rollers, one of which isintermittently driven to either push or pull the metal strip at eachupward movement of the hammer. The conventional driving method is aratchet wheel. However, it has been found that greater accuracy isrequired for close tolerances, and various friction type feeds have beendevised. This type of feed can more readily be adjusted for accuracy butis subject to wear and slippage. Furthermore, when it is necessary toreverse the feed for different kinds of work, is must be dismantled,turned around, and reassembled.

The friction feed of provides four frictional contact points to preventslipping and insure greater accuracy. It i s-imply and easily reversiblewithout dismantling.-

And it is composed of a minimum number of readily fabricated andassembled parts.

Referring more in detail to the drawings 'il-- lustrating my invention,the feed I0, Fig. l, is mounted on and adapted to drive the rollershafti I, and is inturn operated by the arm l2 which i is reciprocallyattached to the power press drive i (not shown).

side edge of the rim l5 to form the outer sides of the wheels, the innersides being hollow, Fig. 4.- The plate I1 is formed with an integral,laterally extending, smaller wheel portion l8, whichprdvides a brakingsurface as hereinafter described.

The wheels l3 and M are mounted on the shaft I l in spaced relation withthe inner hollow sides facing towards each other, Figs. 1 and 2. a Arocker arm I9 is rotatably mounted on theshaft l I between the wheels [3and I4, the spacing being just enough to permit independent move ment ofthe arm i9, Figs. 1 and 2. The rocker arm 19, Fig: 7, comprises a hubportion 20 having an opening 2| for mounting on the shaft II, and twoconcave grooves 22 extending transversely across the arm, one above andone below the" opening 2 i. The rocker arm l9 further comprises i ahort, integral arm portion 23 which extends" forwardly of the hub 20,and a longer arm portion 24 which extends rearwardly and is providedwith an opening 25 for pivotal connection with the power drive arm 12.The portions 23: and 24 are provided, both top and bottom, with eyelets26 positioned equidistant from the hub 20.

The rocker arm I!) drives the wheels I3 and I4 through a pair of drivingfingers 21 mounted above and below the arm l9, Fig. 2. Each finger 21-is generally rectangular in shape, has a rounded bottom edge 28, and iscut away at each side, as at 29, to form a T-shaped portion 30- withsharp corners. The top is provided with an integral tab 3! to which acoil spring 32 is loosely hooked. The opposite end of the spring 32 isalso provided with a hook 33.

Each finger 21 is positioned with the rounded the present invention is:designed to overcome the above disadvantages. It:

one edge of the T-shaped portion 30 rests on-J0 the outer surface of therims l5. -of-. the wheels I3 and M. The finger 21 is retained in thisz.position by the spring 32, the hook 33 being attached to the upper reareyelet 2fi on the rocker:

arm. The lower finger is similarly inclinedparahlel to the upper finger,the lower spring 32 being hooked to the lower forward: eyelet- 26's on.the. rocker arm.

With the parts assembled as hereinabove de- 4 hooked into the oppositeeyelets, as shown in dotted lines in Fig. 2. In reversed position, thefeed will drive the wheels on the downward stroke and idle on the upwardstroke.

It can thus be readily seen that the applicant's device is simple inconstruction and easy and economical! to manufacture; andassemble. Thefeedis accurate and non-slipping, andcan be reversed withoutdismantling, thus saving costly shutdowns.

WhileT I; have: described a particular constructional embodiment of myinvention, it is obvious that changes may readily be made in thesizes-shapeandrelative arrangement of the parts, without 'departing fromthe spirit and scope of the invention as defined in the appended claim.

Iclaimtz I Y Afeeding device comprising a shaft, a pair of" spacedwheels mounted on and keyed to said scribed, a brake 34 is adapted toengage the part. 181 of the wheel 13; Fig. l. (If desired asecond;brake.-.may be-usedon'thezwheel'14.) Thebrake: 34; may be. onany. conventional design. Whichwill' permit the wheels, l3: andHLtorotate:

and. drivethe shaft: H, but whichlw-ill prevent ,5

any backlash; or' other movement of the wheels As illustrated; thebrake34:. comprises two semi.- circular; members 35 and 36,.Fi-g. 5, hingedtoeach other at the top, as at3l. The members.

andv 36;. are lined with conventional brake lining-38. T.he: memberv 35.has an integral de- 1 pendingzportion-tii withanopening. 40;for boltingthe brake to the machine, Fig.1, against rotation.v The; member: 36.. isprovided. with; a

shorterdepending portion-.41, and. an adjustmentscrewAZ, extends throughthe portions. and- 4l; with a: coil spring-l3. positioned: between;

the; screw head;- and; the. portion. to adjust! ably;- urge the partstogether,totightemthe brake.

In; operation; upward; movement: I Zxwill. reciprocateqtheerocker. arm;and: cause the. edges: of the grooves; 22. to, press. against therounded bottoms 28. of; the fingers 1 21; Since: the; springs 32.already retain-the .fingersrinzthe maximum twisted positioniwith theportions 30 resting; on, the: rims l of; the: Wheels. |3;-and: l4,pressure' of; the rocker: arm; 19.;will cause the: fingers: to, .bite:onto; and: frictionally; grab the wheel; sur--- faces and rotatethewheels 13. and ld zand shaft Ll. with the.--arm.- Whenthe arm; 12descends and; moves, the rocker arm, downwardly, the pressure on, the,fingers; 27:. is; released 1 and; thebrake 34 prevents movement-of thewheels while. thefingersslide; back into downward. position. It-shouldbenoted that .thepressurerof one finger- 21; on; one wheel rim issuflicientto operate; the feed; By using. two. wheelsv and; two doublefingers, four contact points are providedgto in.-

sure: accuracy and eliminate: slipping:

Thereversal of; the'feedis easy. and simple I The springs 32 areunhooked; and. the:fingers.

shaft, said wheels having integral laterally extending rims extendingtowards each: other;v a power driven rocker: arm rotatablysmountedfom'said shaft between' said wheels a; grippingimems 1 her mounted on thehub of said rocket:arm,nsaid;v gripping member comprising:a rectangularplate having cut-out portionsat each side. engaging: the rims of said'wheels; and a' coil Zsprin shaving': one end" pivotallwatt'ached" to thetop: of said gripping member; the other ven'd of said coill spring beingreleasably connectedito said rocker arm ata point" spaced-from saidhulito yieldingl'yretain said gripping member-"in: apposition inclinedtowards one end of said? roeker'f arm," whereby the edges -of thecut-out portions of said gripping member engage the upper-fand lowersurfaces'of sai'dwheel rims, s'a-idgripp'ing mem ber gripping said wheelrims when said rocker armis. moved" in one= direction-andreleasing saidwheelj rims when said -rocker iarm ismoved in the opposite direction;said spring rocker arm connection being movable tothe':opposite' side ofsaidhub" to? reverse therincli'r'iation" of said gripping" member"wliereby the gripping and releasing'actionis reversedf I ENRICO-GIPRIANO:

REFEREIQGESMHEll-EDL The following references ar'efoffrecordiin the fileoftli'is patent: H

UNITED STATESJ'PAQZENTSA

